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US 4,226,733 AGranted
Lubricant compositions stabilized against ultra-violet degradation
AssigneeMobil Oil Corporation
InventorsEldon L. Armstrong, Samuel J. Leonardi
Life of this patent
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Abstract
Lubricant compositions are provided which contain an effective amount of a nickel complex, e.g., a nickel phenol-phenolate derivative of a phenol sulfide for stabilizing said compositions against ultra-violet degradation.
Claims9
A lubricant composition comprising a major amount of a mineral oil or a fraction thereof of lubricating viscosity and a minor amount effective for stabilizing said composition against ultra-violet degradation of an organo-nickel complex which is a suitable amine complex of a nickel alkylphenolate sulfide;
- said alkyl groups having from 1 to about 30 carbon atoms said amine selected from the group consisting of primary aliphatic amines, primary aromatic amines and cyclic secondary amines.
Dependencies are inferred from the claim text.